Thermostatic valve control



June 10, 1930. c. H. MORROW THERMOSTATIC VALVE CONTROL Filed May 12.1927 Snow do;

Patented June 1930 N ED STATES PATENT! ori ice .cmmnncn H.1MIORBbW,DIE-CLEVELAND, onro, 'Assxqnon. TO THE nors'rnnnm HEATER COMPANY, onCLEVELAND, ,omo, A-conronA'rIon or QHIO,

Application'lilegl'May 12, 1927. Serial no. 190,839.

Thisiinvention relates to. thermostatic controllers such as are used forcontrolling the flo'w of gas to burners for domestic hot water heaters,stoves or the like. v x

The object of the invention is to provide thermostatic valve controllingmechanism of rugged and simple form; which is quite sensiheat sensitiveexpansion tube.

tive and yet capable of convenient regulation, which comprises only afew parts, and which is unusually compact.

A further objectis toprovide an improved thermostatic controller of themultiplyingv lever type in which a part of the lever mechanism iscontained" or enclosed within the Further objects of the invention arein part obvious and in part will appear more in detail hereinafter.

Injthe drawings, which represent one suit able "embodiment of theinvention, Fig. 1 is a central longitudinal section; Fig. 2 is a crosssection on the line 2-2, Fig. 1 {and Fig;

' 3 is aperspective view, illustrating the operating lever and itsmounting'or support.

The thermostatic controller shown in the drawings comprises a hollowvalve body 1 having a laterally extending-tubular projec- .tion 2externalllyl threaded for connection to the device wliereinthetemperature controlis to take place, such 'as a domestic hot waterstorage tank. (not shown). Within said valve body is a,lower g as supplyor receiving chamber3-and an upper gas delivery chamber 4, said chambersbeing 'separatedby a horizontally, disposed cross wall 5.

opening -6.is provided in said cross wall forestablishing communicationbetween said chambers-andthe flow of gas "through said opening iscontrolled by a valve 7' movable Within the-gas supply chamber 3. Saidvalve v has an operating stem extending upwardly through the cross wallopening 6 and a depending tubular extension slidably mounted upon a nod9 carried by a cap 9 threaded to the valve body, 1 and closing thesupply chamber?) at the bottom. The valve 7 is normally heldagainst itsseat on the cross-wall 5,

with respect to the cross in closing ,position a compression spring 8wall opening 6, surrounding the 21 epending valve extensionTHERMOSTA'IIG VALVE CONTROL per end engaglng the .valve 7. The lower 7chamber 3 is supplied with gas by apipe 10 connected to the bottom ofthe valve body and the gas flowing into the upper chamber 4 is conveyedto the place of use, such as to a burner, by means of a pipe 11connected to the top of the valve-body. a p

The valve 7 is unseated .against the pressure of spring 8, to permit gasto flow from chamber '3-to chamber 4, by means of a-lever -12 movable ina longitudinal slot in andbetween 'thelfacesl t of a rod or bar 15 madeof steel or some other material relatively nonexpansible withrise intemperature. Said lever has a narrow operating end for vengagement withthe upright valve stem and a widened end pivoted at 13 1n the rod or bar15,.

said widened end beyond said pivot 13 having an inclined end edge, whichprovides, beyond said pivot, a lever rocking foot 12.

Most ofthe rod or bar 15 and the lever 12 pivoted therein, portionsthereof, as viewed in Fig. 1, lie within a thermostatically expansibletube 16 at least theright hand end of copper or other suitable metal.The left end portion ofsaid tube is rigidly mounted within the openingof the valve body projecf tion 2, while the right end of said tube isclosed and engages the lever foot 12, such closing of the right end ofsaid tube ,being opening of the valve body opposite to the-- openingoftlie valie body projection 2. As

indicated in Fig. 2, the upright operating stem of valve 7 extends intothe slot of bar of lever 12. p v

The left hand solid end 17 of the rod 15 has a threaded opening 18 toreceive an adjusting screw 19 provided with a collar 20 "or rod 15 belowthe narrow operating end abutting the inner face of the cap 21 threaded4 I to vthe valve body. Said screw is provided with athreaded extension22 rotatable freely s in anon-threaded opening of the cap 21'- andprovided with a check or lock'nut 23 on the outside thereof. By rotationof this screw the rod may be adjusted longitudinally and stat fortemperature. Rotation of rod 15 is then looked in any. position, suchadjustment varying the position of the pivot 13 and consequentlyvarymgthe setting of the thermoprevented in any suitable manner, such as bythe set screw 24 entering the slot of .the rod I or bar 15.

In considering the operation, it may be assumed thatffor any givensetting of the adjusting screw the position of the pivot 13 remains"unchanged, because the expansion- .and contraction (if rod 153seither-so slight Has tobe negligible or, viewing it in another way, itis the differential expansion and contraction betweenerod 15, and tube16 which operates the mechanism As the tempera- 1 ture rises theabutment 16 or the otherwise closed right end of tube 16 moves to theright,-

Fig. 1,01 away from pivot 13 and valve 7' is permitted to move to itsseat under the action of spring 8, whereas when thetemperature falls,the tube 16 contracts, abutment 16 moves toward the-pivot 13, or to theleft, and

J as

ple.

the lever 12 is turned counterclockwise, Fig.

' 1, and movesvalve 7 away from its seat to perber and an opening forgas to said chamber,

a controlling valve in said body for said gas opening, a. tubular lieatresponsive element having an open "end mounted in said valve body and aclosed end, valve operating means I including a slidably mountedrelatively heat responsiveelement and its other end portion lying withinsaid non-expansible member is-means associated-with that end of-thenonexpansible member lying within said valve.

body guiding opening for longitudinally adjusting said member to therebyprovide'a thermostat adjustment. i '3. Thermostatic controllingapparatus as set forth in claim 1, characterized in that said valve'bodyguiding opening is cylindrical and is in alignment with the bore of saidheat responsive tubular element, and in that there is means associatedwith that end of the non-expansible member lying within said valve nallyadjusting said member to thereby provide a thermostat adjustment, saidadjusting means co mprising a screw extending to the outside of thevalve body, being swivelled therein and having. threaded connection tosaid non-expansible member.

4. Thermostatic controlling apparatus as set'fortlrin claim 1,characterized in that said sl otted'and in that saidleveris movable insaid slot and in said valve isprovided with an operating stem extendinginto said slot into engagement with the long arm of said lever. v

5. Thermostatic controlling apparatus as set forth in claim1,.chara'cterized in that said non-expansible member is longitudinallyslotted and'in that said lever is movable in said slot and in said valveis provided with an operating stem extending into said slot intoengagement with the long arm of said lever and-in that said valve bodyis provided with means extending into said slot for preventing rotationof said non-expansible member. 1

In testimony whereof I hereby affix my signature.

CIFJARENCE H. MORBOW.

hav ng one end portion lying within said valve body guiding opening, abell-crank lever pivoted to and'movable with said nonexpansible memberand having a short arm for operative engagement with the closed end ofsaid. heat responsive element and a long arm extending thru said elementinto operative engagement with said valve, and an adjustable'abutm'entfor that end of the IfOIlexpansible member which lies within the valvebody guiding opening.

2L Thermostatic controlling apparatus as set forth in claim 1,characterized in that said valve body guiding opening is cylindrical andis in alignment with the bore of said heat responsive tubular element.and in that there ody guiding opening for longitudi--;

non-expansible member is longitudinally" CERTIFICATE or CORRECTION.

Patent No. 1,762,187. GrantedJune 10, 1930, to.

' (ILARENGE H; oanow; v i

It is hereby c'ertified that error appears in the printed specificationof the above numbered patent requiring correction as follows: Page 2,lines "49 and 50, claim 1, strike out the words "non-expansible memberhaving-one end portion. lying within said" and insert the same to followafter the word "relatively" in line 47; and that the said Letters Patentshould be read with this correction therein that the same may conform tothe record of the case in the PatentOffice.

Signed'and sealed this 9th day of September, A. D. 1930.

'I M. J. Moore,

(Seal) i Acting Commissioner of Patents.

